Receiver for electromagnetic waves.



E. R. cARLsoN. RECEIVER FOR BLEGTROMAGNETIC WAVES. APPLICATION FILED MAR. 16. 1911.

1,027,238. 1* Patented my 21, 1912.

wiflmcooco: I Juve Foz ingress.

'the Contact point can With the. electrolytic iiiiid or mineral detecting substance. l

- magnetic Waves.

Vcompress or ber or any other Well 'is provided with a oi" a set screw EECEVEE EUR ELECTRJQMAGNTC Application filed March 16,

To all whomit may concem: i

Be ity knoivn that l, EDWIN B. CARLSON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new anduseui Improvements in Receivers jfor lille'ctromag-l netic lVaves, of whichthe following is a specification. Y

This invention relates to ya receiver 'for electromagnetic Waves which is adapted to re Aeive Wireless messages from a transmitter situated at a distance.

This invention consists of devices whereby be accurately adjusted' in vertical plane to give sensitive contact The bracket arm of the instrument, carry.n ing the Contactv point can be oscillated with the base as an axis to swing the arm to any desired position and to Contact with any one of a number of' electrolytic substances such as siliconl or a 'tiuid such as diluted nitric acid located in' the circuit of the electrol The Contact point is ador" a spring adapted to enf gage the pin and operated by a screw to tension the spring and thus move the pin up or down in the sleeve.

The novel features of the'invention are more fully described in the following specification and claims and accompanying drawing in which: l

Figure l represents a side elevation' partly in sectionl of an instrument. embodying invention. Fig. 2 is a front view of tliesame. Fig. 3 is a plan view of Fig. l. Fie'. 4 is a modification.

In this drawing the letter a designates a base which may consist of Wood.. hard rudo-v lrnovvn non-conductor. To this base is fixed a stanchion b having a threaded bore for' the insertion of and en gagement ot the threaded stem ot a bracket c. A nutA Z is adapted to lnclr the stem of the bracket totlie stanchion and thus prevent" it from turning. The arm of this bracket sleeve e which 'can be adjusted vertically along the arm to any de' sired position and lined to the arm by 'means f located at the top of theV The sleevecarries a sliding pin g groove z` formed. in the justed by means sleeve. having va notch or specification t Letters-raient.

4the ground While the other illustrated in the -P stein ot' the pin. One end of a semi-ellipiaitented 235i, i-@it 191i. sei-iai sin. cisnes.

tical spring. 'i is adapted to engage 'the notch vynile the other .end ofv thesaid spring is tastened to or strikesagainst the head ot thesleeve: A thumb screvT j has a threaded st-em to engage the sleeve white the knobbed i head of the screw is in contact vvitli the tace ot the spring. When the thumb screvv is actuated it will compress or tension the spring and tie detector pin lvviil slowly move up or down in thefsleeve.

The base c is provided with a` numberof. to contain the electrolytic fluid suchv as an acid, or platensjm on which can be placed diiierent. electroiytic detectors suuch as silicon and peroXid of lead. .v Leads n are fixed to binding posts on the base, one of tlie ieads being connected Vto is connected tp an aerial wire not shown. This circuit can be provided with a telephone adapted to receive the vibrations created in the receiving circuit as :is Weli irnovfn. Each cup or platen is connected to the circuit and when it is desired to change trom one to the other in this posit-ion the bracket arm carrying the pin can be svvnngi in a circle vvitlrthe stanchion bore as the axis to any of the electrolytic substances.

it willy be seen that wlien the thumbscreiv y' is actuated it operates the spring to cornress or tension it and hence move the point-V ed pin either up or doivn in the sleeve, this vertical movement of the pin is very slow so that sensitive adjustment ot the instrument is possible.

it should be said th the pin g is reversible, one endjbeing-orass pointed While the otherend is equipped Witlia tine platinum vvire .p which is inserted into a split end of. the pin. The Wire y) is held in'place by means of a spring o fastened to the pin and of suitable construction to press the Wire into-ric-tional cortact with the Walls ofthe pin, thus holding they Wire firmly in place.

it 'up oitv7 the post.

pin as indicated in Fig. 4. A pin thus designed has a double use the brass end being when a'siibstance in operation like peroxid the loclrnut, Z is mei; l. loosened by turning I use With the substances.

comprising a base of leadis usadas adetector and the platinum point when an electrolytictluid such as nitric acid is employed.

It will be obviousthat the adjusting means for the contact point can be applied to a microscope and similar instruments where fine adjustment of the parts is essential,

of the points being employed for Contact with the tlnid containers' While the second point is adapted for use with the substances.

3. A receiver for electromagnetic Waves, comprising a base provided with :an-electrolytic container, a bracket arm mounted on,

With the iuid l .the base, a sleeve attached to the arm,a pin l having a groove carried by the sleeve, a Spring to engage the grooved portion of the pin, a device operatively connected to tl'e lng and compressing the spring to move the pin vertically in the sleeve.

4;;A receiver for electromagnetic Waves,

comprising a base provided with an electrocarried byy the sleeve havincr a contact polnt consisting of a wire inserted of the pin, and a spring secured inthe split means operatively connected to thesleeve and engaging the spring for tensioning and tically in the sleeve.

In. testimony whereof I htv'e vhereuntoset my hand in the presence of two' subscribing Witnesses.

EDWIN R. CARLSON. f Witnesses:

VVMQE. WVARLAND, Q HRJSTIAN H. OLMs'rAEn'r.

'sleeve and engagingthe spring for tensioncompressing the spring tov move the pinverlyticcontainer, a bracketfarm mounted on the base, a sleeve attached to the arm, a pin part of the pin to frictionallyhold the Wire in place, a spring to engagetheipin, andv 

